noun
subject matter; theme; material (for a work)
Refers to the topic or raw material an artist, writer, or researcher draws on for a creative or academic work. Not used for school subjects or grammatical subjects.
この小説の題材は戦争体験だ。
The subject matter of this novel is the experience of war.
彼は身近な出来事を題材にして絵を描く。
He paints pictures using everyday events as his material.